Earth anchor



w. A BATES EARTH ANCHOR Feb. 11, 1930.

Filed' Aug. 23, 1928 Patented Feb. 11, 1930' UNITED STATES PATENTori-*fica WALTER BATES, F GARY, INDIANA, ASSIGNOR '.II'()l WALTER BATESSTEEL OOR- PORATION, 0F GARY, INDIANA, A CORPORATION OF DELAWARE N EARTHANCHOR Application led August 23, 192B. Serial No. 801,477.

present invention relates to earth an- A further object is to provide animproved method of anchoring a member within the l earth.v

A further object is to provide an improved method of anchoring memberswithin. the earth.

Further objects will appear .as the description proceeds.

Referring to the drawings- Figure 1 represents a tower having its legssecured by means of earth anchors embodying the principles of thepresent invention;

Figure 2 is a view shown on a larger scale than that of Figure 1,showing the earth l anchor inserted in the earth and before it has beenexpanded into gripping relationshipwith the earth;

embodying the principles of the present invention in expanded grippingrelationship I with-the earth and having a section of the' tower securedto said earth anchor; and .Figure 4. shows a slight modication. For thepurpose ofillustrating the present invention, a tower 10 has beenillustrated, which tower has a plurality of legs 11-11, which legs areillustrated as being angles. It will be understood of course that thecross'- sectional contour of the legs 11-f11 may take any preferred formand the anchor comprising the present invention will have acorrescription, however, an angular form of leg will be described.

The earth anchor comprising the present invention comprises a tube 12provided with a plurality of slits 13--13 extending longi- Figure 3 is aview showing an earth anchorv spending form. For purposes'of this detudinally thereof, providing lacings .1a- 14. Said slits 13-13 shouldpreferably bero equal length, equally spaced around the periphery of thetube 12 and equally spaced from the extremities of said tube 12. Saidslits should terminate a short distance away from the bottom end of saidtube 12, leaving a band 15 at the lower end of said tube. Above saidslits 13-13 the tube is imperiorate for a considerable distance, asindicated by the numeral 16. The top portion of the tube 12 is formedfor the attachment of a leg 11. In the-embodiment illustrated in Figures2 and 3, substantially one-half of the tube has been cut away and theremaining portion has been' swaged into angular lform .having two walls17 and 18.7 Said walls 17 and 18 are provided with bolt holes 19-19 forVattachment to corresponding legs 11-11 of the tower 10. In theembodiment in Figure 4, the top portion ofthe tube is not lcut away,sai/d top portion being merely swaged to provide the iat walls 20 and 21disposed in angular relationship with one another, which walls 20 and 21areprovided with the bolt holes 19.-

The hole inthe earth in which the tube 12 is mounted may be ofsubstantially. the same diameter as the tube. 12, or may be larger ifpreferred. In either case, after the tube 12 has been inserted into theearth, a charge of dynamite is lowered into said tube and disposedwithin the lacings 14-14 near the bottom end of said tube. The dynamitethe lacings 14-14, substantially as shown in Figure 3. Concrete is thenpoured down through thetube 12, andif said tube is disposed in a hole ofgreater diameter than-said tube, said concrete will also be poured downsaid whole outside of said tube.. Said concrete will forma ball,indicated by the numeral 22, within the region provided by theexplosionof the dynamite. Regardless of the relative diameters of the tube 12 andthe hole in which it is disposed, said concrete will iiow out around thelacings 14-14, providing a rm grip upon the tube 12. As appears from aninspection of Figure 3, the

force of the explosion is not suicient to disrupt the lacings 14.--14. Y

The earth anchor yillustrated and described is -strong both in tensionand com- 5 pression. A decided advantage of the pres#4 ent invention isthat the lacings` 14-14, after having been expanded by the explosion,would tend to retain the earth until the concrete is poured, a vdecidedadvantage especiaL ly in soft or marshy ground.

Though certain preferred embodiments of the resent'in'vention have beendescribed in detail, many modifications will occur to those 'skilled inthe art. It is intended to 15 cover all such modifications that fallwithin the scope of the appended claims. .What is claimed `is- I 1. Themethod of anchoring which consists of expanding the lacin of a slitted'zo tube intermediate of the lengt thereof within the earth by means ofan explosion where? by to force back said earth and to expand a saidlacings into position to keep back said Y earth, and pouring concrete orthe like into said tube to fill the recess provided b said explodingoperation and to imbe said lacings. y

2. An earth anchorage comrising a tube disposed within the earth, saitube having Y ao intermediate of its length but adjacent to one of itsextremities lacings disposed outward-'i ly ofthe diameter of sald tube'and a concrete ball disposed and embedding said lacings. 3; he method ofanchoring which comprises mounting a tube within aholein the earth,exploding a char e A within an embedded portion of said tu e to expandpor-v tions thereof without vdisrupting the same 4o and to force backthe earth adjacent to said'.

ortions, and -lling the region provided y'said exploding operation withfconcrete or the like. t

Signed at Gary,fIndiana, this 20th day of 4e Aug., 1928.

- WALTER BATES.

